1 /* x86 specific support for ELF
2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
28 #define PLT_CIE_LENGTH 20
29 #define PLT_FDE_LENGTH 36
30 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
31 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
33 #define ABI_64_P(abfd) \
34 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
36 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
37 copying dynamic variables from a shared lib into an app's dynbss
38 section, and instead use a dynamic relocation to point into the
40 #define ELIMINATE_COPY_RELOCS 1
42 #define elf_x86_hash_table(p, id) \
43 (is_elf_hash_table ((p)->hash) \
44 && elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) == (id) \
45 ? ((struct elf_x86_link_hash_table *) ((p)->hash)) : NULL)
47 /* Will references to this symbol always be local in this object? */
48 #define SYMBOL_REFERENCES_LOCAL_P(INFO, H) \
49 _bfd_x86_elf_link_symbol_references_local ((INFO), (H))
51 /* TRUE if an undefined weak symbol should be resolved to 0. Local
52 undefined weak symbol is always resolved to 0. Reference to an
53 undefined weak symbol is resolved to 0 in executable if undefined
54 weak symbol should be resolved to 0 (zero_undefweak > 0). */
55 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
56 ((EH)->elf.root.type == bfd_link_hash_undefweak \
57 && (SYMBOL_REFERENCES_LOCAL_P ((INFO), &(EH)->elf) \
58 || (bfd_link_executable (INFO) \
59 && (EH)->zero_undefweak > 0)))
61 /* Should copy relocation be generated for a symbol. Don't generate
62 copy relocation against a protected symbol defined in a shared
63 object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
64 #define SYMBOL_NO_COPYRELOC(INFO, EH) \
65 ((EH)->def_protected \
66 && ((EH)->elf.root.type == bfd_link_hash_defined \
67 || (EH)->elf.root.type == bfd_link_hash_defweak) \
68 && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \
69 && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
70 && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
72 /* TRUE if dynamic relocation is needed. If we are creating a shared
73 library, and this is a reloc against a global symbol, or a non PC
74 relative reloc against a local symbol, then we need to copy the reloc
75 into the shared library. However, if we are linking with -Bsymbolic,
76 we do not need to copy a reloc against a global symbol which is
77 defined in an object we are including in the link (i.e., DEF_REGULAR
80 If PCREL_PLT is true, don't generate dynamic relocation in PIE for
81 PC-relative relocation against a dynamic function definition in data
82 section when PLT address can be used.
84 If on the other hand, we are creating an executable, we may need to
85 keep relocations for symbols satisfied by a dynamic library if we
86 manage to avoid copy relocs for the symbol.
88 We also need to generate dynamic pointer relocation against
89 STT_GNU_IFUNC symbol in the non-code section. */
90 #define NEED_DYNAMIC_RELOCATION_P(INFO, PCREL_PLT, H, SEC, R_TYPE, \
92 ((bfd_link_pic (INFO) \
93 && (! X86_PCREL_TYPE_P (R_TYPE) \
95 && (! (bfd_link_pie (INFO) \
96 || SYMBOLIC_BIND ((INFO), (H))) \
97 || (H)->root.type == bfd_link_hash_defweak \
98 || (!(bfd_link_pie (INFO) \
100 && (H)->plt.refcount > 0 \
101 && ((SEC)->flags & SEC_CODE) == 0 \
102 && (H)->type == STT_FUNC \
103 && (H)->def_dynamic) \
104 && !(H)->def_regular))))) \
106 && (H)->type == STT_GNU_IFUNC \
107 && (R_TYPE) == POINTER_TYPE \
108 && ((SEC)->flags & SEC_CODE) == 0) \
109 || (ELIMINATE_COPY_RELOCS \
110 && !bfd_link_pic (INFO) \
112 && ((H)->root.type == bfd_link_hash_defweak \
113 || !(H)->def_regular)))
115 /* TRUE if dynamic relocation should be generated. Don't copy a
116 pc-relative relocation into the output file if the symbol needs
117 copy reloc or the symbol is undefined when building executable.
118 Copy dynamic function pointer relocations. Don't generate dynamic
119 relocations against resolved undefined weak symbols in PIE, except
120 when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
121 when PIC is false. */
122 #define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
123 NEED_COPY_RELOC_IN_PIE, \
124 RESOLVED_TO_ZERO, PC32_RELOC) \
125 ((bfd_link_pic (INFO) \
126 && !(NEED_COPY_RELOC_IN_PIE) \
128 || ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
129 && (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
130 || (EH)->elf.root.type != bfd_link_hash_undefweak)) \
131 && ((!X86_PCREL_TYPE_P (R_TYPE) \
132 && !X86_SIZE_TYPE_P (R_TYPE)) \
133 || ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
134 || (ELIMINATE_COPY_RELOCS \
135 && !bfd_link_pic (INFO) \
137 && (EH)->elf.dynindx != -1 \
138 && (!(EH)->elf.non_got_ref \
139 || ((EH)->elf.root.type == bfd_link_hash_undefweak \
140 && !(RESOLVED_TO_ZERO))) \
141 && (((EH)->elf.def_dynamic && !(EH)->elf.def_regular) \
142 || (EH)->elf.root.type == bfd_link_hash_undefined)))
144 /* TRUE if this input relocation should be copied to output. H->dynindx
145 may be -1 if this symbol was marked to become local. */
146 #define COPY_INPUT_RELOC_P(INFO, H, R_TYPE) \
148 && (H)->dynindx != -1 \
149 && (X86_PCREL_TYPE_P (R_TYPE) \
150 || !(bfd_link_executable (INFO) || SYMBOLIC_BIND ((INFO), (H))) \
151 || !(H)->def_regular))
153 /* TRUE if this is actually a static link, or it is a -Bsymbolic link
154 and the symbol is defined locally, or the symbol was forced to be
155 local because of a version file. */
156 #define RESOLVED_LOCALLY_P(INFO, H, HTAB) \
157 (!WILL_CALL_FINISH_DYNAMIC_SYMBOL ((HTAB)->elf.dynamic_sections_created, \
158 bfd_link_pic (INFO), (H)) \
159 || (bfd_link_pic (INFO) \
160 && SYMBOL_REFERENCES_LOCAL_P ((INFO), (H))) \
161 || (ELF_ST_VISIBILITY ((H)->other) \
162 && (H)->root.type == bfd_link_hash_undefweak))
164 /* TRUE if relative relocation should be generated. GOT reference to
165 global symbol in PIC will lead to dynamic symbol. It becomes a
166 problem when "time" or "times" is defined as a variable in an
167 executable, clashing with functions of the same name in libc. If a
168 symbol isn't undefined weak symbol, don't make it dynamic in PIC and
169 generate relative relocation. */
170 #define GENERATE_RELATIVE_RELOC_P(INFO, H) \
171 ((H)->dynindx == -1 \
172 && !(H)->forced_local \
173 && (H)->root.type != bfd_link_hash_undefweak \
174 && bfd_link_pic (INFO))
176 /* TRUE if this is a pointer reference to a local IFUNC. */
177 #define POINTER_LOCAL_IFUNC_P(INFO, H) \
178 ((H)->dynindx == -1 \
179 || (H)->forced_local \
180 || bfd_link_executable (INFO))
182 /* TRUE if this is a PLT reference to a local IFUNC. */
183 #define PLT_LOCAL_IFUNC_P(INFO, H) \
184 ((H)->dynindx == -1 \
185 || ((bfd_link_executable (INFO) \
186 || ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT) \
187 && (H)->def_regular \
188 && (H)->type == STT_GNU_IFUNC))
190 /* TRUE if TLS IE->LE transition is OK. */
191 #define TLS_TRANSITION_IE_TO_LE_P(INFO, H, TLS_TYPE) \
192 (bfd_link_executable (INFO) \
194 && (H)->dynindx == -1 \
195 && (TLS_TYPE & GOT_TLS_IE))
197 /* Verify that the symbol has an entry in the procedure linkage table. */
198 #define VERIFY_PLT_ENTRY(INFO, H, PLT, GOTPLT, RELPLT, LOCAL_UNDEFWEAK) \
201 if (((H)->dynindx == -1 \
202 && !LOCAL_UNDEFWEAK \
203 && !(((H)->forced_local || bfd_link_executable (INFO)) \
204 && (H)->def_regular \
205 && (H)->type == STT_GNU_IFUNC)) \
207 || (GOTPLT) == NULL \
208 || (RELPLT) == NULL) \
213 /* Verify that the symbol supports copy relocation. */
214 #define VERIFY_COPY_RELOC(H, HTAB) \
217 if ((H)->dynindx == -1 \
218 || ((H)->root.type != bfd_link_hash_defined \
219 && (H)->root.type != bfd_link_hash_defweak) \
220 || (HTAB)->elf.srelbss == NULL \
221 || (HTAB)->elf.sreldynrelro == NULL) \
226 /* x86 ELF linker hash entry. */
228 struct elf_x86_link_hash_entry
230 struct elf_link_hash_entry elf
;
232 /* Track dynamic relocs copied for this symbol. */
233 struct elf_dyn_relocs
*dyn_relocs
;
235 unsigned char tls_type
;
237 /* Bit 0: Symbol has no GOT nor PLT relocations.
238 Bit 1: Symbol has non-GOT/non-PLT relocations in text sections.
239 zero_undefweak is initialized to 1 and undefined weak symbol
240 should be resolved to 0 if zero_undefweak > 0. */
241 unsigned int zero_undefweak
: 2;
243 /* Don't call finish_dynamic_symbol on this symbol. */
244 unsigned int no_finish_dynamic_symbol
: 1;
246 /* TRUE if symbol is __tls_get_addr. */
247 unsigned int tls_get_addr
: 1;
249 /* TRUE if symbol is defined as a protected symbol. */
250 unsigned int def_protected
: 1;
252 /* 0: Symbol references are unknown.
253 1: Symbol references aren't local.
254 2: Symbol references are local.
256 unsigned int local_ref
: 2;
258 /* TRUE if symbol is defined by linker. */
259 unsigned int linker_def
: 1;
261 /* TRUE if symbol is referenced by R_386_GOTOFF relocation. This is
262 only used by i386. */
263 unsigned int gotoff_ref
: 1;
265 /* TRUE if a weak symbol with a real definition needs a copy reloc.
266 When there is a weak symbol with a real definition, the processor
267 independent code will have arranged for us to see the real
268 definition first. We need to copy the needs_copy bit from the
269 real definition and check it when allowing copy reloc in PIE. This
270 is only used by x86-64. */
271 unsigned int needs_copy
: 1;
273 /* Information about the GOT PLT entry. Filled when there are both
274 GOT and PLT relocations against the same function. */
275 union gotplt_union plt_got
;
277 /* Information about the second PLT entry. */
278 union gotplt_union plt_second
;
280 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
281 starting at the end of the jump table. */
285 struct elf_x86_lazy_plt_layout
287 /* The first entry in a lazy procedure linkage table looks like this. */
288 const bfd_byte
*plt0_entry
;
289 unsigned int plt0_entry_size
; /* Size of PLT0 entry. */
291 /* Later entries in a lazy procedure linkage table look like this. */
292 const bfd_byte
*plt_entry
;
293 unsigned int plt_entry_size
; /* Size of each PLT entry. */
295 /* The TLSDESC entry in a lazy procedure linkage table looks like
296 this. This is for x86-64 only. */
297 const bfd_byte
*plt_tlsdesc_entry
;
298 unsigned int plt_tlsdesc_entry_size
; /* Size of TLSDESC entry. */
300 /* Offsets into the TLSDESC entry that are to be replaced with
301 GOT+8 and GOT+TDG. These are for x86-64 only. */
302 unsigned int plt_tlsdesc_got1_offset
;
303 unsigned int plt_tlsdesc_got2_offset
;
305 /* Offset of the end of the PC-relative instructions containing
306 plt_tlsdesc_got1_offset and plt_tlsdesc_got2_offset. These
307 are for x86-64 only. */
308 unsigned int plt_tlsdesc_got1_insn_end
;
309 unsigned int plt_tlsdesc_got2_insn_end
;
311 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
313 unsigned int plt0_got1_offset
;
314 unsigned int plt0_got2_offset
;
316 /* Offset of the end of the PC-relative instruction containing
317 plt0_got2_offset. This is for x86-64 only. */
318 unsigned int plt0_got2_insn_end
;
320 /* Offsets into plt_entry that are to be replaced with... */
321 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
322 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
323 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
325 /* Length of the PC-relative instruction containing plt_got_offset.
326 This is used for x86-64 only. */
327 unsigned int plt_got_insn_size
;
329 /* Offset of the end of the PC-relative jump to plt0_entry. This is
330 used for x86-64 only. */
331 unsigned int plt_plt_insn_end
;
333 /* Offset into plt_entry where the initial value of the GOT entry
335 unsigned int plt_lazy_offset
;
337 /* The first entry in a PIC lazy procedure linkage table looks like
339 const bfd_byte
*pic_plt0_entry
;
341 /* Subsequent entries in a PIC lazy procedure linkage table look
343 const bfd_byte
*pic_plt_entry
;
345 /* .eh_frame covering the lazy .plt section. */
346 const bfd_byte
*eh_frame_plt
;
347 unsigned int eh_frame_plt_size
;
350 struct elf_x86_non_lazy_plt_layout
352 /* Entries in a non-lazy procedure linkage table look like this. */
353 const bfd_byte
*plt_entry
;
354 /* Entries in a PIC non-lazy procedure linkage table look like this.
355 This is only used for i386 where absolute PLT and PIC PLT are
357 const bfd_byte
*pic_plt_entry
;
359 unsigned int plt_entry_size
; /* Size of each PLT entry. */
361 /* Offsets into plt_entry that are to be replaced with... */
362 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
364 /* Length of the PC-relative instruction containing plt_got_offset.
365 This is used for x86-64 only. */
366 unsigned int plt_got_insn_size
;
368 /* .eh_frame covering the non-lazy .plt section. */
369 const bfd_byte
*eh_frame_plt
;
370 unsigned int eh_frame_plt_size
;
373 struct elf_x86_plt_layout
375 /* The first entry in a lazy procedure linkage table looks like this. */
376 const bfd_byte
*plt0_entry
;
377 /* Entries in a procedure linkage table look like this. */
378 const bfd_byte
*plt_entry
;
379 unsigned int plt_entry_size
; /* Size of each PLT entry. */
382 unsigned int has_plt0
;
384 /* Offsets into plt_entry that are to be replaced with... */
385 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
387 /* Length of the PC-relative instruction containing plt_got_offset.
388 This is only used for x86-64. */
389 unsigned int plt_got_insn_size
;
391 /* Alignment of the .iplt section. */
392 unsigned int iplt_alignment
;
394 /* .eh_frame covering the .plt section. */
395 const bfd_byte
*eh_frame_plt
;
396 unsigned int eh_frame_plt_size
;
399 /* Values in tls_type of x86 ELF linker hash entry. */
400 #define GOT_UNKNOWN 0
404 #define GOT_TLS_IE_POS 5
405 #define GOT_TLS_IE_NEG 6
406 #define GOT_TLS_IE_BOTH 7
407 #define GOT_TLS_GDESC 8
408 #define GOT_TLS_GD_BOTH_P(type) \
409 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
410 #define GOT_TLS_GD_P(type) \
411 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
412 #define GOT_TLS_GDESC_P(type) \
413 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
414 #define GOT_TLS_GD_ANY_P(type) \
415 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
417 #define elf_x86_hash_entry(ent) \
418 ((struct elf_x86_link_hash_entry *)(ent))
420 enum elf_x86_target_os
428 /* x86 ELF linker hash table. */
430 struct elf_x86_link_hash_table
432 struct elf_link_hash_table elf
;
434 /* Short-cuts to get to dynamic linker sections. */
436 asection
*plt_eh_frame
;
437 asection
*plt_second
;
438 asection
*plt_second_eh_frame
;
440 asection
*plt_got_eh_frame
;
442 /* Parameters describing PLT generation, lazy or non-lazy. */
443 struct elf_x86_plt_layout plt
;
445 /* Parameters describing lazy PLT generation. */
446 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
448 /* Parameters describing non-lazy PLT generation. */
449 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
453 bfd_signed_vma refcount
;
457 /* The amount of space used by the jump slots in the GOT. */
458 bfd_vma sgotplt_jump_table_size
;
460 /* Small local sym cache. */
461 struct sym_cache sym_cache
;
463 /* _TLS_MODULE_BASE_ symbol. */
464 struct bfd_link_hash_entry
*tls_module_base
;
466 /* Used by local STT_GNU_IFUNC symbols. */
467 htab_t loc_hash_table
;
468 void * loc_hash_memory
;
470 /* The offset into sgot of the GOT entry used by the PLT entry
474 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
475 bfd_vma next_jump_slot_index
;
476 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
477 bfd_vma next_irelative_index
;
479 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
480 to read-only sections. */
481 bfd_boolean readonly_dynrelocs_against_ifunc
;
483 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.
484 This is used for i386 only. */
487 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. This
488 is only used for i386. */
489 bfd_vma next_tls_desc_index
;
491 /* The offset into splt of the PLT entry for the TLS descriptor
492 resolver. Special values are 0, if not necessary (or not found
493 to be necessary yet), and -1 if needed but not determined
494 yet. This is only used for x86-64. */
497 /* Value used to fill the unused bytes of the first PLT entry. This
498 is only used for i386. */
499 bfd_byte plt0_pad_byte
;
501 /* TRUE if GOT is referenced. */
502 unsigned int got_referenced
: 1;
504 /* TRUE if PLT is PC-relative. PLT in PDE and PC-relative PLT in PIE
505 can be used as function address.
507 NB: i386 has non-PIC PLT and PIC PLT. Only non-PIC PLT in PDE can
508 be used as function address. PIC PLT in PIE can't be used as
510 unsigned int pcrel_plt
: 1;
512 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
513 bfd_vma (*r_sym
) (bfd_vma
);
514 bfd_boolean (*is_reloc_section
) (const char *);
515 enum elf_target_id target_id
;
516 enum elf_x86_target_os target_os
;
517 unsigned int sizeof_reloc
;
518 unsigned int dt_reloc
;
519 unsigned int dt_reloc_sz
;
520 unsigned int dt_reloc_ent
;
521 unsigned int got_entry_size
;
522 unsigned int pointer_r_type
;
523 int dynamic_interpreter_size
;
524 const char *dynamic_interpreter
;
525 const char *tls_get_addr
;
528 /* Architecture-specific backend data for x86. */
530 struct elf_x86_backend_data
533 enum elf_x86_target_os target_os
;
536 #define get_elf_x86_backend_data(abfd) \
537 ((const struct elf_x86_backend_data *) \
538 get_elf_backend_data (abfd)->arch_data)
540 struct elf_x86_init_table
542 /* The lazy PLT layout. */
543 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
545 /* The non-lazy PLT layout. */
546 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
548 /* The lazy PLT layout for IBT. */
549 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
551 /* The non-lazy PLT layout for IBT. */
552 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
554 bfd_byte plt0_pad_byte
;
556 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
557 bfd_vma (*r_sym
) (bfd_vma
);
560 struct elf_x86_obj_tdata
562 struct elf_obj_tdata root
;
564 /* tls_type for each local got entry. */
565 char *local_got_tls_type
;
567 /* GOTPLT entries for TLS descriptors. */
568 bfd_vma
*local_tlsdesc_gotent
;
571 enum elf_x86_plt_type
585 enum elf_x86_plt_type type
;
586 unsigned int plt_got_offset
;
587 unsigned int plt_entry_size
;
588 unsigned int plt_got_insn_size
; /* Only used for x86-64. */
592 #define elf_x86_tdata(abfd) \
593 ((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
595 #define elf_x86_local_got_tls_type(abfd) \
596 (elf_x86_tdata (abfd)->local_got_tls_type)
598 #define elf_x86_local_tlsdesc_gotent(abfd) \
599 (elf_x86_tdata (abfd)->local_tlsdesc_gotent)
601 #define elf_x86_compute_jump_table_size(htab) \
602 ((htab)->elf.srelplt->reloc_count * (htab)->got_entry_size)
604 #define is_x86_elf(bfd, htab) \
605 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
606 && elf_tdata (bfd) != NULL \
607 && elf_object_id (bfd) == (htab)->target_id)
609 extern bfd_boolean _bfd_x86_elf_mkobject
612 extern void _bfd_x86_elf_set_tls_module_base
613 (struct bfd_link_info
*);
615 extern bfd_vma _bfd_x86_elf_dtpoff_base
616 (struct bfd_link_info
*);
618 extern bfd_boolean _bfd_x86_elf_readonly_dynrelocs
619 (struct elf_link_hash_entry
*, void *);
621 extern struct elf_link_hash_entry
* _bfd_elf_x86_get_local_sym_hash
622 (struct elf_x86_link_hash_table
*, bfd
*, const Elf_Internal_Rela
*,
625 extern hashval_t _bfd_x86_elf_local_htab_hash
628 extern int _bfd_x86_elf_local_htab_eq
629 (const void *, const void *);
631 extern struct bfd_hash_entry
* _bfd_x86_elf_link_hash_newfunc
632 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
634 extern struct bfd_link_hash_table
* _bfd_x86_elf_link_hash_table_create
637 extern int _bfd_x86_elf_compare_relocs
638 (const void *, const void *);
640 extern bfd_boolean _bfd_x86_elf_link_check_relocs
641 (bfd
*, struct bfd_link_info
*);
643 extern bfd_boolean _bfd_x86_elf_size_dynamic_sections
644 (bfd
*, struct bfd_link_info
*);
646 extern struct elf_x86_link_hash_table
*_bfd_x86_elf_finish_dynamic_sections
647 (bfd
*, struct bfd_link_info
*);
649 extern bfd_boolean _bfd_x86_elf_always_size_sections
650 (bfd
*, struct bfd_link_info
*);
652 extern void _bfd_x86_elf_merge_symbol_attribute
653 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*,
654 bfd_boolean
, bfd_boolean
);
656 extern void _bfd_x86_elf_copy_indirect_symbol
657 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
658 struct elf_link_hash_entry
*);
660 extern bfd_boolean _bfd_x86_elf_fixup_symbol
661 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
663 extern bfd_boolean _bfd_x86_elf_hash_symbol
664 (struct elf_link_hash_entry
*);
666 extern bfd_boolean _bfd_x86_elf_adjust_dynamic_symbol
667 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
669 extern void _bfd_x86_elf_hide_symbol
670 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
672 extern bfd_boolean _bfd_x86_elf_link_symbol_references_local
673 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
675 extern asection
* _bfd_x86_elf_gc_mark_hook
676 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
677 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
679 extern long _bfd_x86_elf_get_synthetic_symtab
680 (bfd
*, long, long, bfd_vma
, struct elf_x86_plt
[], asymbol
**,
683 extern enum elf_property_kind _bfd_x86_elf_parse_gnu_properties
684 (bfd
*, unsigned int, bfd_byte
*, unsigned int);
686 extern bfd_boolean _bfd_x86_elf_merge_gnu_properties
687 (struct bfd_link_info
*, bfd
*, elf_property
*, elf_property
*);
689 extern void _bfd_x86_elf_link_fixup_gnu_properties
690 (struct bfd_link_info
*, elf_property_list
**);
692 extern bfd
* _bfd_x86_elf_link_setup_gnu_properties
693 (struct bfd_link_info
*, struct elf_x86_init_table
*);
695 extern void _bfd_x86_elf_link_fixup_ifunc_symbol
696 (struct bfd_link_info
*, struct elf_x86_link_hash_table
*,
697 struct elf_link_hash_entry
*, Elf_Internal_Sym
*sym
);
699 #define bfd_elf64_mkobject \
700 _bfd_x86_elf_mkobject
701 #define bfd_elf32_mkobject \
702 _bfd_x86_elf_mkobject
703 #define bfd_elf64_bfd_link_hash_table_create \
704 _bfd_x86_elf_link_hash_table_create
705 #define bfd_elf32_bfd_link_hash_table_create \
706 _bfd_x86_elf_link_hash_table_create
707 #define bfd_elf64_bfd_link_check_relocs \
708 _bfd_x86_elf_link_check_relocs
709 #define bfd_elf32_bfd_link_check_relocs \
710 _bfd_x86_elf_link_check_relocs
712 #define elf_backend_size_dynamic_sections \
713 _bfd_x86_elf_size_dynamic_sections
714 #define elf_backend_always_size_sections \
715 _bfd_x86_elf_always_size_sections
716 #define elf_backend_merge_symbol_attribute \
717 _bfd_x86_elf_merge_symbol_attribute
718 #define elf_backend_copy_indirect_symbol \
719 _bfd_x86_elf_copy_indirect_symbol
720 #define elf_backend_fixup_symbol \
721 _bfd_x86_elf_fixup_symbol
722 #define elf_backend_hash_symbol \
723 _bfd_x86_elf_hash_symbol
724 #define elf_backend_adjust_dynamic_symbol \
725 _bfd_x86_elf_adjust_dynamic_symbol
726 #define elf_backend_gc_mark_hook \
727 _bfd_x86_elf_gc_mark_hook
728 #define elf_backend_omit_section_dynsym \
729 _bfd_elf_omit_section_dynsym_all
730 #define elf_backend_parse_gnu_properties \
731 _bfd_x86_elf_parse_gnu_properties
732 #define elf_backend_merge_gnu_properties \
733 _bfd_x86_elf_merge_gnu_properties
734 #define elf_backend_fixup_gnu_properties \
735 _bfd_x86_elf_link_fixup_gnu_properties